( ) 
through the pores of the body, and by a kind of juxta-pofi- 
tion : but Everhard, fuppofing a fimultaneous formation of all 
the inftruments of nutrition together at firft, andefteeming 
the Mafs of bloud by reafon of its afperity and eagernefs un- 
fitfor nutrition, and rather apt to prey upon, than feed the 
parts, maintains; that the liquor is fucked out of the Amnion by 
the mouth, conco&ed in the ftomack, and thence paffed into 
the Milkit veffels, even from the beginning. Mean time they 
both agree in this, that the Embrio doth breathy .but not feed, 
through the Umbilical veffels. 
This our Author undertakes to difprove^ and having aver- 
ted themildnefs of, at leaft, many parts of the bloud, and con- 
fequently their fitnefs for nutrition, he defends (he Harveyan 
do&rine, of the Colliquatim of the Nourijhing Juyce by the Ar- 
teries, and its conveyance to th efcetus by the veins. 
In the third Chapter, the Membranes and Humours of Em- 
bryds are confidered. The Membranes are in feme., three, in 
others, four, in an Egg, fix. All Placentiferous Animals ( if I 
may affume this word ) he affirms to have three Membranes^ 
and Sows, Mares , and Women alfoj but only two Humours. 
Again, Bitches , Cats , and Comes , four Membranes , and three Hu* 
mours • fo that the Number of the Membranes hath been hither- 
to obferved alwaies to exceed that of the Humours. 
Giving the Hiftory of both, he begins from sheep, Corvs t and 
other Ruminating Animals, defcribin gfirjl the Chorion , affign-* 
ing its Vfe, and comparing it with that in Dear, Sows, Mares, 
Women , Rabbets, Bitches, and Cats ^hen with young. Then he 
proceeds to the defcription of the Allantoides ( the Membrane 
immediately encompaffing that skin, wherein th efatus is wrap- 
ped ) and thence to that of the Amnion, wherein the Embryo 
itfelflyeth, fwimming in its alimental liquor. And lajlly to 
that which is obferved to be in Bitches , Cats , and Rabbets , and 
contains a very good and nourifhing Juyce; which how it 
comes thither, is a difficult inquiry, as well as that other, how 
the liquor gets into the Amnion. To refolve both which our 
Author , having difproved the Filtration of the liquor, held by 
Courvey and Everhard out of ;the Chorion into the Amnion, and 
evinced, that the liquor in the Allantoides, interjected between 
